package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        // 获取前端提交过来的用户名
        String username = employeeLoginDTO.getUsername();
        // 获取前端提交过来的密码
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //密码比对
        // 把前端传过来的密码加密一下，前端传过来的密码是明文，数据库里的是密文
        // password代表是前端传来的密码，前端的密码变成了加密后的密文
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void addEmp(EmployeeDTO dto) {
        Employee employee = new Employee();
        //属性拷贝
        BeanUtils.copyProperties(dto, employee);
        // 1.添加属性值
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        // 2.调用mapper 存表
        employeeMapper.insert(employee);

    }

    /**
     * 使用分页插件
     * 1.设置分页参数
     * 2.调用mapper 返回值为page
     * 3.封装对象并返回
     * @param dto
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(), dto.getPageSize());
        Page<Employee> page =employeeMapper.list(dto.getName());
        return new PageResult(page.getTotal(), page.getResult());
    }

        /**
         * 启用禁用员工账号
         *
         * @param status
         * @param id
         */
    @Override
        public void startOrStop(Integer status, Long id) {
            Employee employee = Employee.builder()
                    .status(status)
                    .id(id)
                    .build();

            employeeMapper.update(employee);
        }

        /**
         * 回显员工信息
         * @param id
         * @return
         */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }
        /**
         * 员工信息修改
         * @param dot
         */
    @Override
    public void update(EmployeeDTO dot) {
        //补属性 复制已有属性进去 获取没有的属性
        Employee employee=new Employee();
        BeanUtils.copyProperties(dot,employee);
        employee.setUpdateUser(BaseContext.getCurrentId());
        employee.setUpdateTime(LocalDateTime.now());
        employeeMapper.update(employee);
    }


}
